A 1,000 kg car rounds an unbanked circular curve of radius 50 m on a wet road where the static coefficient of friction is . What is the maximum speed the car can negotiate the curve without skidding? ()
Answer and explanation
Correct answer: C.
- Step 1: Centripetal force is provided solely by static friction: .
- Step 2: .
- Step 3: Substitute values: .
Answer
9.9 m/s.
Why not the others: '' uses ; '' divides by 2; '' doubles speed.
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